JPH0227841B2 - - Google Patents

Info

Publication number
JPH0227841B2
JPH0227841B2 JP56026910A JP2691081A JPH0227841B2 JP H0227841 B2 JPH0227841 B2 JP H0227841B2 JP 56026910 A JP56026910 A JP 56026910A JP 2691081 A JP2691081 A JP 2691081A JP H0227841 B2 JPH0227841 B2 JP H0227841B2
Authority
JP
Japan
Prior art keywords
loop
antenna
frequency
equation
conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP56026910A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57142002A (en
Inventor
Kazutaka Hidaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP56026910A priority Critical patent/JPS57142002A/ja
Priority to US06/348,206 priority patent/US4518965A/en
Priority to EP82300926A priority patent/EP0060628B1/en
Priority to DE8282300926T priority patent/DE3268209D1/de
Priority to CA000397099A priority patent/CA1195771A/en
Priority to KR8200884A priority patent/KR860000331B1/ko
Publication of JPS57142002A publication Critical patent/JPS57142002A/ja
Publication of JPH0227841B2 publication Critical patent/JPH0227841B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable

Landscapes

  • Details Of Aerials (AREA)
JP56026910A 1981-02-27 1981-02-27 Small-sized loop antenna Granted JPS57142002A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP56026910A JPS57142002A (en) 1981-02-27 1981-02-27 Small-sized loop antenna
US06/348,206 US4518965A (en) 1981-02-27 1982-02-12 Tuned small loop antenna and method for designing thereof
EP82300926A EP0060628B1 (en) 1981-02-27 1982-02-23 Tuned small loop antenna
DE8282300926T DE3268209D1 (en) 1981-02-27 1982-02-23 Tuned small loop antenna
CA000397099A CA1195771A (en) 1981-02-27 1982-02-25 Tuned small loop antenna with wide frequency range capabilities and method for designing thereof
KR8200884A KR860000331B1 (ko) 1981-02-27 1982-02-27 소형 루프 안테나

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56026910A JPS57142002A (en) 1981-02-27 1981-02-27 Small-sized loop antenna

Publications (2)

Publication Number Publication Date
JPS57142002A JPS57142002A (en) 1982-09-02
JPH0227841B2 true JPH0227841B2 (enrdf_load_stackoverflow) 1990-06-20

Family

ID=12206366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56026910A Granted JPS57142002A (en) 1981-02-27 1981-02-27 Small-sized loop antenna

Country Status (6)

Country Link
US (1) US4518965A (enrdf_load_stackoverflow)
EP (1) EP0060628B1 (enrdf_load_stackoverflow)
JP (1) JPS57142002A (enrdf_load_stackoverflow)
KR (1) KR860000331B1 (enrdf_load_stackoverflow)
CA (1) CA1195771A (enrdf_load_stackoverflow)
DE (1) DE3268209D1 (enrdf_load_stackoverflow)

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DE8709495U1 (de) * 1987-07-10 1987-10-01 Mühlau, Karl-Heinz, 7880 Bad Säckingen Sende- und Empfangsantenne
CA2004365C (en) * 1989-01-23 1994-05-03 William Tan Reactance buffered loop antenna and method for making the same
US5128686A (en) * 1989-01-23 1992-07-07 Motorola, Inc. Reactance buffered loop antenna and method for making the same
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DE9115582U1 (de) * 1991-12-16 1992-12-17 Siemens AG, 80333 München Leiterplattenantenne
JP3282082B2 (ja) * 1992-03-26 2002-05-13 アイシン精機株式会社 円偏波用線状アンテナ
US5298894A (en) * 1992-06-17 1994-03-29 Badger Meter, Inc. Utility meter transponder/antenna assembly for underground installations
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US5646633A (en) * 1995-04-05 1997-07-08 Mcdonnell Douglas Corporation Microstrip antenna having a plurality of broken loops
EP0776530A4 (en) * 1995-06-21 1998-06-10 Motorola Inc METHOD AND ANTENNA PRODUCING AN OMNIDIRECTIONAL RADIATION DIAGRAM
CA2168138A1 (en) * 1996-01-26 1997-07-27 Robert Gordon Yewen Low frequency electromagnetic communication system, and antenna therefor
EP0786824A1 (en) * 1996-01-27 1997-07-30 Akitoshi Imamura A microloop antenna
US6218995B1 (en) 1997-06-13 2001-04-17 Itron, Inc. Telemetry antenna system
WO1999022548A2 (en) 1997-10-24 1999-05-06 Itron, Inc. Passive radiator
GB9806488D0 (en) * 1998-03-27 1998-05-27 Philips Electronics Nv Radio apparatus
US5999138A (en) * 1998-03-30 1999-12-07 Ponce De Leon; Lorenzo A. Low power switched diversity antenna system
US6304230B1 (en) * 1999-11-04 2001-10-16 Sigem Multiple coupled resonant loop antenna
US6359594B1 (en) * 1999-12-01 2002-03-19 Logitech Europe S.A. Loop antenna parasitics reduction technique
DE10047214A1 (de) * 2000-09-23 2002-04-11 Philips Corp Intellectual Pty Schaltungsanordnung
RU2183888C1 (ru) * 2000-10-19 2002-06-20 Жастеро Трейдинг Лимитед Способ увеличения действующей высоты малогабаритного антенного устройства и малогабаритное антенное устройство для осуществления способа
JP3629448B2 (ja) * 2001-07-27 2005-03-16 Ｔｄｋ株式会社 アンテナ装置及びそれを備えた電子機器
WO2003087857A2 (de) * 2002-04-18 2003-10-23 Ackermann Patent Gmbh Verfahren und einrichtung zum aufnehmen und aufbereiten von störfeldern und störstrahlen
JP2004328128A (ja) * 2003-04-22 2004-11-18 Alps Electric Co Ltd アンテナ装置
DE10325399A1 (de) * 2003-05-28 2004-12-30 Atmel Germany Gmbh Schaltungsanordnung zur Phasenmodulation für rückstreubasierte Transporder
EP1943696A1 (en) * 2005-10-26 2008-07-16 Nxp B.V. Uhf/vhf planar antenna device, notably for portable electronic equipment
US7268735B2 (en) * 2005-12-23 2007-09-11 Chin-Yuan Chung Antenna structure
KR100797172B1 (ko) * 2006-08-08 2008-01-23 삼성전자주식회사 정합회로가 일체로 형성된 루프 안테나
US7876274B2 (en) 2007-06-21 2011-01-25 Apple Inc. Wireless handheld electronic device
GB0724692D0 (en) * 2007-12-19 2008-01-30 Rhodes Mark Antenna formed of multiple resonant loops
CN201689980U (zh) * 2010-05-04 2010-12-29 中兴通讯股份有限公司 偶极子天线及移动通信终端
USD659684S1 (en) * 2010-05-25 2012-05-15 Nissei Limited Antenna
TWI477931B (zh) 2010-06-11 2015-03-21 Ricoh Co Ltd 資訊儲存裝置、可移除裝置、顯像劑容器及影像形成裝置
US9070969B2 (en) * 2010-07-06 2015-06-30 Apple Inc. Tunable antenna systems
US8556178B2 (en) * 2011-03-04 2013-10-15 Hand Held Products, Inc. RFID devices using metamaterial antennas
US9166279B2 (en) 2011-03-07 2015-10-20 Apple Inc. Tunable antenna system with receiver diversity
US9246221B2 (en) * 2011-03-07 2016-01-26 Apple Inc. Tunable loop antennas
US8776002B2 (en) * 2011-09-06 2014-07-08 Variable Z0, Ltd. Variable Z0 antenna device design system and method
US9350069B2 (en) 2012-01-04 2016-05-24 Apple Inc. Antenna with switchable inductor low-band tuning
US9190712B2 (en) 2012-02-03 2015-11-17 Apple Inc. Tunable antenna system
US8798554B2 (en) 2012-02-08 2014-08-05 Apple Inc. Tunable antenna system with multiple feeds
US9559433B2 (en) 2013-03-18 2017-01-31 Apple Inc. Antenna system having two antennas and three ports
US9331397B2 (en) 2013-03-18 2016-05-03 Apple Inc. Tunable antenna with slot-based parasitic element
US9444130B2 (en) 2013-04-10 2016-09-13 Apple Inc. Antenna system with return path tuning and loop element
US9698466B2 (en) 2013-05-24 2017-07-04 Microsoft Technology Licensing, Llc Radiating structure formed as a part of a metal computing device case
US9531059B2 (en) 2013-05-24 2016-12-27 Microsoft Technology Licensing, Llc Side face antenna for a computing device case
US9543639B2 (en) * 2013-05-24 2017-01-10 Microsoft Technology Licensing, Llc Back face antenna in a computing device case
WO2016121130A1 (en) * 2015-01-29 2016-08-04 Sato Holdings Kabushiki Kaisha Rfid infinity antenna
DE102018106095B3 (de) * 2017-11-29 2019-01-31 Antennentechnik Abb Bad Blankenburg Gmbh Aktive Multiband-Antenne für den terrestrischen Rundfunkempfang
CN108711669B (zh) 2018-05-28 2021-04-23 京东方科技集团股份有限公司 一种频率可调天线及其制作方法
JP6839159B2 (ja) * 2018-11-15 2021-03-03 サトーホールディングス株式会社 Ｒｆｉｄ無限アンテナ

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US2467962A (en) * 1947-01-28 1949-04-19 Electronies Res Inc High-frequency antenna
US2551664A (en) * 1949-11-29 1951-05-08 Galper Samuel Television antenna
US2881429A (en) * 1953-06-30 1959-04-07 Gilbert B Radcliffe Indoor television antenna
DE973146C (de) * 1953-07-23 1959-12-10 Telefunken Gmbh Antennenanordnung fuer einen weiten Frequenzbereich
US3078462A (en) * 1958-07-18 1963-02-19 Julius Herman One-turn loop antenna
US3210766A (en) * 1962-02-15 1965-10-05 Ralph O Parker Slot type antenna with tuning circuit
US3588905A (en) * 1967-10-05 1971-06-28 John H Dunlavy Jr Wide range tunable transmitting loop antenna
DE2418407A1 (de) * 1967-12-12 1975-09-25 Hans Heinrich Prof Dr Meinke Antennenverstaerker
US3710337A (en) * 1970-03-24 1973-01-09 Jfd Electronics Corp Miniature tv antenna
US3641576A (en) * 1970-04-13 1972-02-08 Zenith Radio Corp Printed circuit inductive loop antenna
US3631499A (en) * 1970-08-17 1971-12-28 Edwin M Turner Electrically small double-loop antenna with distributed loading and impedance matching
US3680127A (en) * 1971-04-07 1972-07-25 Us Air Force Tunable omnidirectional antenna
GB1307648A (en) * 1971-06-17 1973-02-21 Fte Maximal Fernsehtech Circular multi-range receiving aerial assembly
US3956751A (en) * 1974-12-24 1976-05-11 Julius Herman Miniaturized tunable antenna for general electromagnetic radiation and sensing with particular application to TV and FM
JPS5441192A (en) * 1977-09-07 1979-04-02 Shizuoka Seiki Co Ltd Moister detecter for hulled rice
DE2907369C2 (de) * 1979-02-24 1984-10-18 Dornier System Gmbh, 7990 Friedrichshafen Antennenanordnung für Schleppflugkörper
US4342999A (en) * 1980-11-25 1982-08-03 Rca Corporation Loop antenna arrangements for inclusion in a television receiver

Also Published As

Publication number Publication date
CA1195771A (en) 1985-10-22
JPS57142002A (en) 1982-09-02
KR830009664A (ko) 1983-12-22
DE3268209D1 (en) 1986-02-13
KR860000331B1 (ko) 1986-04-09
EP0060628A1 (en) 1982-09-22
US4518965A (en) 1985-05-21
EP0060628B1 (en) 1986-01-02

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